./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/in-de61.c --full-output --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a9b967e5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops-crafted-1/in-de61.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 49b7efdcf8f4d6c873493bd370328870547a88b20d287c5de5342268b0966917 --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a9b967e-m [2024-09-11 19:27:19,485 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-11 19:27:19,546 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-11 19:27:19,552 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-11 19:27:19,553 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-11 19:27:19,585 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-11 19:27:19,587 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-11 19:27:19,588 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-11 19:27:19,588 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-11 19:27:19,590 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-11 19:27:19,590 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-11 19:27:19,590 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-11 19:27:19,591 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-11 19:27:19,592 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-11 19:27:19,592 INFO L153 SettingsManager]: * Use SBE=true [2024-09-11 19:27:19,593 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-11 19:27:19,593 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-11 19:27:19,593 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-11 19:27:19,593 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-11 19:27:19,593 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-11 19:27:19,593 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-11 19:27:19,594 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-11 19:27:19,594 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-11 19:27:19,596 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-11 19:27:19,596 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-11 19:27:19,596 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-11 19:27:19,596 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-11 19:27:19,597 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-11 19:27:19,597 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-11 19:27:19,597 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-11 19:27:19,597 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-11 19:27:19,597 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-11 19:27:19,597 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-11 19:27:19,597 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-11 19:27:19,598 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-11 19:27:19,598 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-11 19:27:19,598 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-11 19:27:19,598 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-11 19:27:19,598 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-11 19:27:19,598 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-11 19:27:19,598 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-11 19:27:19,599 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-11 19:27:19,599 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/certificate-witnesses-artifact/automizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 49b7efdcf8f4d6c873493bd370328870547a88b20d287c5de5342268b0966917 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-11 19:27:19,797 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-11 19:27:19,815 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-11 19:27:19,817 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-11 19:27:19,818 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-11 19:27:19,819 INFO L274 PluginConnector]: CDTParser initialized [2024-09-11 19:27:19,820 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops-crafted-1/in-de61.c [2024-09-11 19:27:21,049 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-11 19:27:21,183 INFO L384 CDTParser]: Found 1 translation units. [2024-09-11 19:27:21,184 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/in-de61.c [2024-09-11 19:27:21,190 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/61ea13af2/38684106250449e19deff80b18c69031/FLAG93dd408d9 [2024-09-11 19:27:21,201 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/61ea13af2/38684106250449e19deff80b18c69031 [2024-09-11 19:27:21,203 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-11 19:27:21,204 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-11 19:27:21,205 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-11 19:27:21,205 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-11 19:27:21,210 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-11 19:27:21,210 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 07:27:21" (1/1) ... [2024-09-11 19:27:21,211 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b8349a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:27:21, skipping insertion in model container [2024-09-11 19:27:21,213 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 07:27:21" (1/1) ... [2024-09-11 19:27:21,227 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-11 19:27:21,342 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/in-de61.c[368,381] [2024-09-11 19:27:21,359 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-11 19:27:21,365 INFO L200 MainTranslator]: Completed pre-run [2024-09-11 19:27:21,373 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/in-de61.c[368,381] [2024-09-11 19:27:21,376 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-11 19:27:21,393 INFO L204 MainTranslator]: Completed translation [2024-09-11 19:27:21,393 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:27:21 WrapperNode [2024-09-11 19:27:21,394 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-11 19:27:21,394 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-11 19:27:21,395 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-11 19:27:21,395 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-11 19:27:21,403 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:27:21" (1/1) ... [2024-09-11 19:27:21,407 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:27:21" (1/1) ... [2024-09-11 19:27:21,420 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 85 [2024-09-11 19:27:21,420 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-11 19:27:21,421 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-11 19:27:21,421 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-11 19:27:21,421 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-11 19:27:21,428 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:27:21" (1/1) ... [2024-09-11 19:27:21,428 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:27:21" (1/1) ... [2024-09-11 19:27:21,429 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:27:21" (1/1) ... [2024-09-11 19:27:21,437 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-11 19:27:21,438 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:27:21" (1/1) ... [2024-09-11 19:27:21,438 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:27:21" (1/1) ... [2024-09-11 19:27:21,440 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:27:21" (1/1) ... [2024-09-11 19:27:21,445 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:27:21" (1/1) ... [2024-09-11 19:27:21,445 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:27:21" (1/1) ... [2024-09-11 19:27:21,446 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:27:21" (1/1) ... [2024-09-11 19:27:21,447 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-11 19:27:21,448 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-11 19:27:21,448 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-11 19:27:21,448 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-11 19:27:21,449 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:27:21" (1/1) ... [2024-09-11 19:27:21,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-11 19:27:21,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:27:21,477 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-11 19:27:21,478 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-11 19:27:21,512 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-11 19:27:21,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-11 19:27:21,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-11 19:27:21,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-11 19:27:21,564 INFO L242 CfgBuilder]: Building ICFG [2024-09-11 19:27:21,566 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-11 19:27:21,668 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-09-11 19:27:21,668 INFO L291 CfgBuilder]: Performing block encoding [2024-09-11 19:27:21,686 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-11 19:27:21,686 INFO L318 CfgBuilder]: Removed 6 assume(true) statements. [2024-09-11 19:27:21,687 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 07:27:21 BoogieIcfgContainer [2024-09-11 19:27:21,687 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-11 19:27:21,688 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-11 19:27:21,688 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-11 19:27:21,691 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-11 19:27:21,691 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.09 07:27:21" (1/3) ... [2024-09-11 19:27:21,692 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64c4aa1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 07:27:21, skipping insertion in model container [2024-09-11 19:27:21,692 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:27:21" (2/3) ... [2024-09-11 19:27:21,692 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64c4aa1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 07:27:21, skipping insertion in model container [2024-09-11 19:27:21,692 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 07:27:21" (3/3) ... [2024-09-11 19:27:21,693 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de61.c [2024-09-11 19:27:21,705 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-11 19:27:21,705 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-11 19:27:21,745 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-11 19:27:21,750 INFO L336 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1befff8f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-11 19:27:21,750 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-11 19:27:21,754 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:21,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-09-11 19:27:21,760 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:27:21,761 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:27:21,761 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:27:21,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:21,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1862478825, now seen corresponding path program 1 times [2024-09-11 19:27:21,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:27:21,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833032487] [2024-09-11 19:27:21,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:27:21,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:27:21,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:27:21,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:27:21,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:27:21,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833032487] [2024-09-11 19:27:21,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833032487] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:27:21,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 19:27:21,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-11 19:27:21,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159989007] [2024-09-11 19:27:21,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:27:21,887 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-11 19:27:21,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:27:21,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-11 19:27:21,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-11 19:27:21,908 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:21,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:27:21,924 INFO L93 Difference]: Finished difference Result 26 states and 48 transitions. [2024-09-11 19:27:21,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-11 19:27:21,926 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-09-11 19:27:21,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:27:21,931 INFO L225 Difference]: With dead ends: 26 [2024-09-11 19:27:21,932 INFO L226 Difference]: Without dead ends: 12 [2024-09-11 19:27:21,934 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-11 19:27:21,938 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:27:21,939 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:27:21,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2024-09-11 19:27:21,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2024-09-11 19:27:21,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:21,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 17 transitions. [2024-09-11 19:27:21,961 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 17 transitions. Word has length 11 [2024-09-11 19:27:21,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:27:21,962 INFO L474 AbstractCegarLoop]: Abstraction has 12 states and 17 transitions. [2024-09-11 19:27:21,962 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:21,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:21,963 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 17 transitions. [2024-09-11 19:27:21,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-09-11 19:27:21,963 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:27:21,964 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:27:21,964 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-11 19:27:21,965 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:27:21,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:21,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1976995429, now seen corresponding path program 1 times [2024-09-11 19:27:21,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:27:21,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257703681] [2024-09-11 19:27:21,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:27:21,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:27:22,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:27:22,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:27:22,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:27:22,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257703681] [2024-09-11 19:27:22,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257703681] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:27:22,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 19:27:22,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-11 19:27:22,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091133948] [2024-09-11 19:27:22,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:27:22,456 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-11 19:27:22,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:27:22,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-11 19:27:22,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-11 19:27:22,457 INFO L87 Difference]: Start difference. First operand 12 states and 17 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:22,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:27:22,534 INFO L93 Difference]: Finished difference Result 30 states and 45 transitions. [2024-09-11 19:27:22,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-11 19:27:22,535 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-09-11 19:27:22,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:27:22,535 INFO L225 Difference]: With dead ends: 30 [2024-09-11 19:27:22,535 INFO L226 Difference]: Without dead ends: 13 [2024-09-11 19:27:22,536 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-09-11 19:27:22,537 INFO L434 NwaCegarLoop]: 7 mSDtfsCounter, 13 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:27:22,538 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 23 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:27:22,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2024-09-11 19:27:22,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2024-09-11 19:27:22,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:22,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 18 transitions. [2024-09-11 19:27:22,541 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 18 transitions. Word has length 11 [2024-09-11 19:27:22,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:27:22,542 INFO L474 AbstractCegarLoop]: Abstraction has 13 states and 18 transitions. [2024-09-11 19:27:22,542 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:22,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:22,542 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 18 transitions. [2024-09-11 19:27:22,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-09-11 19:27:22,542 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:27:22,543 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:27:22,543 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-11 19:27:22,543 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:27:22,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:22,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1296164696, now seen corresponding path program 1 times [2024-09-11 19:27:22,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:27:22,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825060465] [2024-09-11 19:27:22,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:27:22,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:27:22,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:27:22,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:27:22,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:27:22,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825060465] [2024-09-11 19:27:22,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825060465] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:27:22,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595516734] [2024-09-11 19:27:22,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:27:22,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:27:22,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:27:22,625 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:27:22,626 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-11 19:27:22,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:27:22,664 INFO L262 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-11 19:27:22,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:27:22,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:27:22,689 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:27:22,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:27:22,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595516734] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:27:22,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:27:22,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-09-11 19:27:22,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550748630] [2024-09-11 19:27:22,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:27:22,731 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-11 19:27:22,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:27:22,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-11 19:27:22,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-09-11 19:27:22,732 INFO L87 Difference]: Start difference. First operand 13 states and 18 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:22,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:27:22,869 INFO L93 Difference]: Finished difference Result 53 states and 90 transitions. [2024-09-11 19:27:22,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-11 19:27:22,870 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-09-11 19:27:22,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:27:22,871 INFO L225 Difference]: With dead ends: 53 [2024-09-11 19:27:22,872 INFO L226 Difference]: Without dead ends: 45 [2024-09-11 19:27:22,872 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2024-09-11 19:27:22,873 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 34 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:27:22,873 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 57 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:27:22,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-09-11 19:27:22,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2024-09-11 19:27:22,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.542857142857143) internal successors, (54), 35 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:22,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 54 transitions. [2024-09-11 19:27:22,885 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 54 transitions. Word has length 12 [2024-09-11 19:27:22,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:27:22,885 INFO L474 AbstractCegarLoop]: Abstraction has 36 states and 54 transitions. [2024-09-11 19:27:22,885 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:22,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:22,886 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 54 transitions. [2024-09-11 19:27:22,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-11 19:27:22,886 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:27:22,886 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:27:22,900 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-11 19:27:23,090 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:27:23,091 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:27:23,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:23,092 INFO L85 PathProgramCache]: Analyzing trace with hash 886412585, now seen corresponding path program 1 times [2024-09-11 19:27:23,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:27:23,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692277493] [2024-09-11 19:27:23,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:27:23,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:27:23,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:27:23,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:27:23,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:27:23,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692277493] [2024-09-11 19:27:23,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692277493] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:27:23,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669859884] [2024-09-11 19:27:23,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:27:23,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:27:23,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:27:23,205 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:27:23,206 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-11 19:27:23,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:27:23,242 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-11 19:27:23,243 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:27:23,263 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:27:23,263 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:27:23,320 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:27:23,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669859884] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:27:23,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:27:23,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2024-09-11 19:27:23,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183706007] [2024-09-11 19:27:23,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:27:23,321 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-11 19:27:23,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:27:23,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-11 19:27:23,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-11 19:27:23,322 INFO L87 Difference]: Start difference. First operand 36 states and 54 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:23,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:27:23,744 INFO L93 Difference]: Finished difference Result 102 states and 164 transitions. [2024-09-11 19:27:23,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-11 19:27:23,744 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-09-11 19:27:23,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:27:23,745 INFO L225 Difference]: With dead ends: 102 [2024-09-11 19:27:23,745 INFO L226 Difference]: Without dead ends: 82 [2024-09-11 19:27:23,746 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=665, Unknown=0, NotChecked=0, Total=870 [2024-09-11 19:27:23,746 INFO L434 NwaCegarLoop]: 5 mSDtfsCounter, 75 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-11 19:27:23,746 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 58 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-11 19:27:23,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-09-11 19:27:23,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 51. [2024-09-11 19:27:23,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.46) internal successors, (73), 50 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:23,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 73 transitions. [2024-09-11 19:27:23,762 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 73 transitions. Word has length 14 [2024-09-11 19:27:23,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:27:23,762 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 73 transitions. [2024-09-11 19:27:23,763 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:23,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:23,763 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 73 transitions. [2024-09-11 19:27:23,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-09-11 19:27:23,765 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:27:23,765 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:27:23,780 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-11 19:27:23,965 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:27:23,966 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:27:23,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:23,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1755904316, now seen corresponding path program 1 times [2024-09-11 19:27:23,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:27:23,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175364857] [2024-09-11 19:27:23,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:27:23,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:27:23,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:27:24,041 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-11 19:27:24,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:27:24,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175364857] [2024-09-11 19:27:24,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175364857] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:27:24,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856226905] [2024-09-11 19:27:24,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:27:24,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:27:24,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:27:24,045 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:27:24,046 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-11 19:27:24,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:27:24,075 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-11 19:27:24,076 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:27:24,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-11 19:27:24,149 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:27:24,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-11 19:27:24,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856226905] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:27:24,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:27:24,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 13 [2024-09-11 19:27:24,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223922692] [2024-09-11 19:27:24,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:27:24,253 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-11 19:27:24,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:27:24,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-11 19:27:24,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-09-11 19:27:24,254 INFO L87 Difference]: Start difference. First operand 51 states and 73 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:24,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:27:24,383 INFO L93 Difference]: Finished difference Result 90 states and 130 transitions. [2024-09-11 19:27:24,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-11 19:27:24,383 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-09-11 19:27:24,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:27:24,384 INFO L225 Difference]: With dead ends: 90 [2024-09-11 19:27:24,384 INFO L226 Difference]: Without dead ends: 80 [2024-09-11 19:27:24,384 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2024-09-11 19:27:24,385 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 41 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:27:24,385 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 109 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:27:24,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-09-11 19:27:24,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 58. [2024-09-11 19:27:24,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.4912280701754386) internal successors, (85), 57 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:24,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 85 transitions. [2024-09-11 19:27:24,401 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 85 transitions. Word has length 15 [2024-09-11 19:27:24,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:27:24,402 INFO L474 AbstractCegarLoop]: Abstraction has 58 states and 85 transitions. [2024-09-11 19:27:24,402 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:24,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:24,402 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 85 transitions. [2024-09-11 19:27:24,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-09-11 19:27:24,404 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:27:24,404 INFO L216 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:27:24,418 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-11 19:27:24,608 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:27:24,609 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:27:24,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:24,609 INFO L85 PathProgramCache]: Analyzing trace with hash -948471589, now seen corresponding path program 2 times [2024-09-11 19:27:24,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:27:24,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892817657] [2024-09-11 19:27:24,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:27:24,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:27:24,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:27:24,697 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:27:24,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:27:24,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892817657] [2024-09-11 19:27:24,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892817657] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:27:24,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396211208] [2024-09-11 19:27:24,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 19:27:24,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:27:24,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:27:24,701 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:27:24,702 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-11 19:27:24,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 19:27:24,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:27:24,736 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-11 19:27:24,738 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:27:24,753 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:27:24,753 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:27:24,823 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:27:24,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396211208] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:27:24,823 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:27:24,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-09-11 19:27:24,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920037430] [2024-09-11 19:27:24,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:27:24,824 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-11 19:27:24,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:27:24,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-11 19:27:24,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2024-09-11 19:27:24,826 INFO L87 Difference]: Start difference. First operand 58 states and 85 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:25,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:27:25,389 INFO L93 Difference]: Finished difference Result 215 states and 357 transitions. [2024-09-11 19:27:25,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-11 19:27:25,389 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-09-11 19:27:25,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:27:25,390 INFO L225 Difference]: With dead ends: 215 [2024-09-11 19:27:25,393 INFO L226 Difference]: Without dead ends: 191 [2024-09-11 19:27:25,393 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=301, Invalid=691, Unknown=0, NotChecked=0, Total=992 [2024-09-11 19:27:25,394 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 221 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-11 19:27:25,394 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 167 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-11 19:27:25,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2024-09-11 19:27:25,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 118. [2024-09-11 19:27:25,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.5299145299145298) internal successors, (179), 117 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:25,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 179 transitions. [2024-09-11 19:27:25,436 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 179 transitions. Word has length 15 [2024-09-11 19:27:25,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:27:25,437 INFO L474 AbstractCegarLoop]: Abstraction has 118 states and 179 transitions. [2024-09-11 19:27:25,437 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:25,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:25,437 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 179 transitions. [2024-09-11 19:27:25,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-11 19:27:25,438 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:27:25,438 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:27:25,450 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-11 19:27:25,638 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:27:25,639 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:27:25,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:25,640 INFO L85 PathProgramCache]: Analyzing trace with hash 456382938, now seen corresponding path program 1 times [2024-09-11 19:27:25,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:27:25,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63512300] [2024-09-11 19:27:25,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:27:25,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:27:25,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:27:26,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:27:26,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:27:26,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63512300] [2024-09-11 19:27:26,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63512300] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:27:26,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427658216] [2024-09-11 19:27:26,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:27:26,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:27:26,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:27:26,012 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:27:26,014 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-11 19:27:26,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:27:26,053 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-11 19:27:26,054 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:27:26,298 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:27:26,299 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:27:26,545 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:27:26,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427658216] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:27:26,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:27:26,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 25 [2024-09-11 19:27:26,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711528293] [2024-09-11 19:27:26,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:27:26,547 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-11 19:27:26,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:27:26,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-11 19:27:26,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2024-09-11 19:27:26,548 INFO L87 Difference]: Start difference. First operand 118 states and 179 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:27,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:27:27,358 INFO L93 Difference]: Finished difference Result 181 states and 264 transitions. [2024-09-11 19:27:27,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-11 19:27:27,358 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-09-11 19:27:27,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:27:27,359 INFO L225 Difference]: With dead ends: 181 [2024-09-11 19:27:27,359 INFO L226 Difference]: Without dead ends: 134 [2024-09-11 19:27:27,360 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=280, Invalid=1280, Unknown=0, NotChecked=0, Total=1560 [2024-09-11 19:27:27,361 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 59 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-11 19:27:27,361 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 41 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-11 19:27:27,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2024-09-11 19:27:27,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 109. [2024-09-11 19:27:27,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.5925925925925926) internal successors, (172), 108 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:27,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 172 transitions. [2024-09-11 19:27:27,394 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 172 transitions. Word has length 17 [2024-09-11 19:27:27,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:27:27,394 INFO L474 AbstractCegarLoop]: Abstraction has 109 states and 172 transitions. [2024-09-11 19:27:27,394 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:27,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:27,394 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 172 transitions. [2024-09-11 19:27:27,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-11 19:27:27,395 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:27:27,395 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:27:27,407 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-11 19:27:27,599 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-11 19:27:27,600 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:27:27,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:27,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1016533723, now seen corresponding path program 2 times [2024-09-11 19:27:27,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:27:27,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024385047] [2024-09-11 19:27:27,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:27:27,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:27:27,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:27:27,696 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:27:27,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:27:27,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024385047] [2024-09-11 19:27:27,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024385047] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:27:27,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538673392] [2024-09-11 19:27:27,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 19:27:27,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:27:27,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:27:27,698 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:27:27,699 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-11 19:27:27,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 19:27:27,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:27:27,730 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-11 19:27:27,731 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:27:27,778 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-11 19:27:27,779 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:27:27,830 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-11 19:27:27,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538673392] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:27:27,830 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:27:27,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 12 [2024-09-11 19:27:27,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133983610] [2024-09-11 19:27:27,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:27:27,831 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-11 19:27:27,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:27:27,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-11 19:27:27,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2024-09-11 19:27:27,831 INFO L87 Difference]: Start difference. First operand 109 states and 172 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:28,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:27:28,295 INFO L93 Difference]: Finished difference Result 266 states and 410 transitions. [2024-09-11 19:27:28,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-11 19:27:28,295 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-09-11 19:27:28,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:27:28,296 INFO L225 Difference]: With dead ends: 266 [2024-09-11 19:27:28,296 INFO L226 Difference]: Without dead ends: 228 [2024-09-11 19:27:28,297 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=152, Invalid=840, Unknown=0, NotChecked=0, Total=992 [2024-09-11 19:27:28,297 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 88 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-11 19:27:28,298 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 117 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-11 19:27:28,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2024-09-11 19:27:28,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 138. [2024-09-11 19:27:28,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.5255474452554745) internal successors, (209), 137 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:28,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 209 transitions. [2024-09-11 19:27:28,344 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 209 transitions. Word has length 17 [2024-09-11 19:27:28,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:27:28,345 INFO L474 AbstractCegarLoop]: Abstraction has 138 states and 209 transitions. [2024-09-11 19:27:28,345 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:28,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:28,345 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 209 transitions. [2024-09-11 19:27:28,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-11 19:27:28,346 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:27:28,346 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:27:28,358 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-11 19:27:28,546 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:27:28,547 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:27:28,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:28,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1498581513, now seen corresponding path program 1 times [2024-09-11 19:27:28,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:27:28,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573675854] [2024-09-11 19:27:28,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:27:28,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:27:28,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:27:28,608 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-11 19:27:28,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:27:28,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573675854] [2024-09-11 19:27:28,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573675854] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:27:28,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700034421] [2024-09-11 19:27:28,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:27:28,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:27:28,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:27:28,610 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:27:28,611 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-11 19:27:28,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:27:28,646 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-11 19:27:28,647 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:27:28,675 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-11 19:27:28,675 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:27:28,733 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-11 19:27:28,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700034421] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:27:28,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:27:28,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2024-09-11 19:27:28,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284396983] [2024-09-11 19:27:28,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:27:28,735 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-11 19:27:28,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:27:28,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-11 19:27:28,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-09-11 19:27:28,737 INFO L87 Difference]: Start difference. First operand 138 states and 209 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:29,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:27:29,019 INFO L93 Difference]: Finished difference Result 214 states and 322 transitions. [2024-09-11 19:27:29,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-11 19:27:29,019 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-09-11 19:27:29,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:27:29,021 INFO L225 Difference]: With dead ends: 214 [2024-09-11 19:27:29,021 INFO L226 Difference]: Without dead ends: 178 [2024-09-11 19:27:29,021 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2024-09-11 19:27:29,022 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 41 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:27:29,022 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 102 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:27:29,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2024-09-11 19:27:29,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 144. [2024-09-11 19:27:29,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.5104895104895104) internal successors, (216), 143 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:29,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 216 transitions. [2024-09-11 19:27:29,083 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 216 transitions. Word has length 20 [2024-09-11 19:27:29,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:27:29,083 INFO L474 AbstractCegarLoop]: Abstraction has 144 states and 216 transitions. [2024-09-11 19:27:29,083 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:29,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:29,084 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 216 transitions. [2024-09-11 19:27:29,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-11 19:27:29,087 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:27:29,087 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:27:29,106 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-11 19:27:29,287 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:27:29,287 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:27:29,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:29,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1433121687, now seen corresponding path program 3 times [2024-09-11 19:27:29,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:27:29,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111184740] [2024-09-11 19:27:29,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:27:29,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:27:29,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:27:29,396 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:27:29,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:27:29,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111184740] [2024-09-11 19:27:29,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111184740] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:27:29,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071359757] [2024-09-11 19:27:29,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-11 19:27:29,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:27:29,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:27:29,398 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:27:29,400 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-11 19:27:29,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-11 19:27:29,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:27:29,434 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-11 19:27:29,434 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:27:29,496 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-11 19:27:29,496 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:27:29,578 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-11 19:27:29,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071359757] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:27:29,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:27:29,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 15 [2024-09-11 19:27:29,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940613469] [2024-09-11 19:27:29,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:27:29,578 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-11 19:27:29,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:27:29,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-11 19:27:29,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2024-09-11 19:27:29,579 INFO L87 Difference]: Start difference. First operand 144 states and 216 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:30,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:27:30,707 INFO L93 Difference]: Finished difference Result 367 states and 549 transitions. [2024-09-11 19:27:30,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2024-09-11 19:27:30,707 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-09-11 19:27:30,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:27:30,708 INFO L225 Difference]: With dead ends: 367 [2024-09-11 19:27:30,708 INFO L226 Difference]: Without dead ends: 331 [2024-09-11 19:27:30,710 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1514 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=524, Invalid=4446, Unknown=0, NotChecked=0, Total=4970 [2024-09-11 19:27:30,711 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 196 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-11 19:27:30,711 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 148 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-11 19:27:30,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2024-09-11 19:27:30,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 168. [2024-09-11 19:27:30,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.5089820359281436) internal successors, (252), 167 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:30,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 252 transitions. [2024-09-11 19:27:30,766 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 252 transitions. Word has length 20 [2024-09-11 19:27:30,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:27:30,766 INFO L474 AbstractCegarLoop]: Abstraction has 168 states and 252 transitions. [2024-09-11 19:27:30,766 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:30,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:30,767 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 252 transitions. [2024-09-11 19:27:30,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-11 19:27:30,767 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:27:30,767 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:27:30,779 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-11 19:27:30,967 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:27:30,968 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:27:30,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:30,968 INFO L85 PathProgramCache]: Analyzing trace with hash -913992165, now seen corresponding path program 2 times [2024-09-11 19:27:30,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:27:30,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412247229] [2024-09-11 19:27:30,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:27:30,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:27:30,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:27:31,030 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-11 19:27:31,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:27:31,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412247229] [2024-09-11 19:27:31,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412247229] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:27:31,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490867885] [2024-09-11 19:27:31,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 19:27:31,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:27:31,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:27:31,032 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:27:31,033 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-11 19:27:31,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 19:27:31,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:27:31,067 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-11 19:27:31,068 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:27:31,087 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-11 19:27:31,088 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:27:31,123 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-11 19:27:31,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490867885] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:27:31,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:27:31,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2024-09-11 19:27:31,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756536889] [2024-09-11 19:27:31,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:27:31,124 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-11 19:27:31,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:27:31,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-11 19:27:31,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-11 19:27:31,125 INFO L87 Difference]: Start difference. First operand 168 states and 252 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:31,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:27:31,244 INFO L93 Difference]: Finished difference Result 265 states and 376 transitions. [2024-09-11 19:27:31,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-11 19:27:31,244 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-09-11 19:27:31,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:27:31,246 INFO L225 Difference]: With dead ends: 265 [2024-09-11 19:27:31,246 INFO L226 Difference]: Without dead ends: 252 [2024-09-11 19:27:31,246 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-09-11 19:27:31,247 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 30 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:27:31,247 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 69 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:27:31,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2024-09-11 19:27:31,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 179. [2024-09-11 19:27:31,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.4719101123595506) internal successors, (262), 178 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:31,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 262 transitions. [2024-09-11 19:27:31,293 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 262 transitions. Word has length 21 [2024-09-11 19:27:31,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:27:31,293 INFO L474 AbstractCegarLoop]: Abstraction has 179 states and 262 transitions. [2024-09-11 19:27:31,293 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:31,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:31,294 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 262 transitions. [2024-09-11 19:27:31,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-11 19:27:31,294 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:27:31,294 INFO L216 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:27:31,306 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-11 19:27:31,494 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-11 19:27:31,495 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:27:31,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:31,495 INFO L85 PathProgramCache]: Analyzing trace with hash 724529434, now seen corresponding path program 3 times [2024-09-11 19:27:31,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:27:31,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648701729] [2024-09-11 19:27:31,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:27:31,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:27:31,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:27:31,565 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-11 19:27:31,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:27:31,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648701729] [2024-09-11 19:27:31,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648701729] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:27:31,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730366786] [2024-09-11 19:27:31,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-11 19:27:31,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:27:31,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:27:31,567 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:27:31,569 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-11 19:27:31,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-11 19:27:31,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:27:31,601 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-11 19:27:31,602 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:27:31,621 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-11 19:27:31,622 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:27:31,701 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-11 19:27:31,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730366786] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:27:31,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:27:31,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 15 [2024-09-11 19:27:31,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519421092] [2024-09-11 19:27:31,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:27:31,702 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-11 19:27:31,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:27:31,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-11 19:27:31,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2024-09-11 19:27:31,702 INFO L87 Difference]: Start difference. First operand 179 states and 262 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:32,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:27:32,300 INFO L93 Difference]: Finished difference Result 424 states and 659 transitions. [2024-09-11 19:27:32,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-11 19:27:32,300 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-09-11 19:27:32,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:27:32,302 INFO L225 Difference]: With dead ends: 424 [2024-09-11 19:27:32,302 INFO L226 Difference]: Without dead ends: 371 [2024-09-11 19:27:32,302 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=317, Invalid=675, Unknown=0, NotChecked=0, Total=992 [2024-09-11 19:27:32,302 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 190 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-11 19:27:32,303 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 249 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-11 19:27:32,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2024-09-11 19:27:32,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 228. [2024-09-11 19:27:32,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 1.47136563876652) internal successors, (334), 227 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:32,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 334 transitions. [2024-09-11 19:27:32,389 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 334 transitions. Word has length 21 [2024-09-11 19:27:32,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:27:32,389 INFO L474 AbstractCegarLoop]: Abstraction has 228 states and 334 transitions. [2024-09-11 19:27:32,389 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:32,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:32,389 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 334 transitions. [2024-09-11 19:27:32,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-11 19:27:32,390 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:27:32,390 INFO L216 NwaCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:27:32,401 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-11 19:27:32,592 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-11 19:27:32,593 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:27:32,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:32,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1455367480, now seen corresponding path program 3 times [2024-09-11 19:27:32,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:27:32,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059982750] [2024-09-11 19:27:32,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:27:32,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:27:32,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:27:32,752 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:27:32,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:27:32,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059982750] [2024-09-11 19:27:32,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059982750] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:27:32,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787720068] [2024-09-11 19:27:32,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-11 19:27:32,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:27:32,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:27:32,755 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:27:32,756 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-11 19:27:32,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-09-11 19:27:32,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:27:32,797 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-09-11 19:27:32,798 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:27:32,825 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:27:32,825 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:27:33,042 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:27:33,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787720068] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:27:33,043 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:27:33,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 28 [2024-09-11 19:27:33,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304570086] [2024-09-11 19:27:33,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:27:33,043 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-09-11 19:27:33,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:27:33,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-09-11 19:27:33,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2024-09-11 19:27:33,044 INFO L87 Difference]: Start difference. First operand 228 states and 334 transitions. Second operand has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 28 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:36,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:27:36,689 INFO L93 Difference]: Finished difference Result 788 states and 1266 transitions. [2024-09-11 19:27:36,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-09-11 19:27:36,689 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 28 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-09-11 19:27:36,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:27:36,692 INFO L225 Difference]: With dead ends: 788 [2024-09-11 19:27:36,692 INFO L226 Difference]: Without dead ends: 739 [2024-09-11 19:27:36,694 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1329 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1624, Invalid=3632, Unknown=0, NotChecked=0, Total=5256 [2024-09-11 19:27:36,695 INFO L434 NwaCegarLoop]: 59 mSDtfsCounter, 1325 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 1087 mSolverCounterSat, 718 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1325 SdHoareTripleChecker+Valid, 808 SdHoareTripleChecker+Invalid, 1805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 718 IncrementalHoareTripleChecker+Valid, 1087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-09-11 19:27:36,695 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1325 Valid, 808 Invalid, 1805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [718 Valid, 1087 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-09-11 19:27:36,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2024-09-11 19:27:36,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 354. [2024-09-11 19:27:36,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 1.5099150141643058) internal successors, (533), 353 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:36,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 533 transitions. [2024-09-11 19:27:36,835 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 533 transitions. Word has length 22 [2024-09-11 19:27:36,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:27:36,835 INFO L474 AbstractCegarLoop]: Abstraction has 354 states and 533 transitions. [2024-09-11 19:27:36,835 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 28 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:36,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:36,835 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 533 transitions. [2024-09-11 19:27:36,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-11 19:27:36,836 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:27:36,836 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:27:36,848 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-11 19:27:37,036 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:27:37,037 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:27:37,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:37,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1673899067, now seen corresponding path program 4 times [2024-09-11 19:27:37,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:27:37,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648151991] [2024-09-11 19:27:37,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:27:37,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:27:37,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:27:37,399 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-11 19:27:37,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:27:37,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648151991] [2024-09-11 19:27:37,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648151991] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:27:37,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236269141] [2024-09-11 19:27:37,399 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-11 19:27:37,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:27:37,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:27:37,401 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:27:37,402 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-11 19:27:37,451 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-11 19:27:37,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:27:37,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-09-11 19:27:37,458 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:27:37,774 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:27:37,774 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:27:37,965 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-11 19:27:37,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236269141] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:27:37,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:27:37,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 9] total 30 [2024-09-11 19:27:37,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854074685] [2024-09-11 19:27:37,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:27:37,966 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-09-11 19:27:37,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:27:37,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-09-11 19:27:37,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2024-09-11 19:27:37,967 INFO L87 Difference]: Start difference. First operand 354 states and 533 transitions. Second operand has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:39,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:27:39,506 INFO L93 Difference]: Finished difference Result 474 states and 673 transitions. [2024-09-11 19:27:39,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-11 19:27:39,506 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2024-09-11 19:27:39,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:27:39,508 INFO L225 Difference]: With dead ends: 474 [2024-09-11 19:27:39,508 INFO L226 Difference]: Without dead ends: 383 [2024-09-11 19:27:39,509 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=399, Invalid=2463, Unknown=0, NotChecked=0, Total=2862 [2024-09-11 19:27:39,509 INFO L434 NwaCegarLoop]: 7 mSDtfsCounter, 48 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-11 19:27:39,509 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 67 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-11 19:27:39,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2024-09-11 19:27:39,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 322. [2024-09-11 19:27:39,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 1.485981308411215) internal successors, (477), 321 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:39,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 477 transitions. [2024-09-11 19:27:39,647 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 477 transitions. Word has length 23 [2024-09-11 19:27:39,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:27:39,647 INFO L474 AbstractCegarLoop]: Abstraction has 322 states and 477 transitions. [2024-09-11 19:27:39,647 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:39,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:39,647 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 477 transitions. [2024-09-11 19:27:39,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-11 19:27:39,648 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:27:39,648 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:27:39,659 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-11 19:27:39,848 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-11 19:27:39,848 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:27:39,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:39,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1538122779, now seen corresponding path program 4 times [2024-09-11 19:27:39,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:27:39,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584259764] [2024-09-11 19:27:39,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:27:39,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:27:39,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:27:39,967 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:27:39,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:27:39,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584259764] [2024-09-11 19:27:39,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584259764] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:27:39,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551790736] [2024-09-11 19:27:39,967 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-11 19:27:39,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:27:39,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:27:39,969 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:27:39,970 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-11 19:27:40,004 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-11 19:27:40,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:27:40,005 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-11 19:27:40,006 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:27:40,079 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-11 19:27:40,079 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:27:40,175 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-11 19:27:40,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551790736] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:27:40,175 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:27:40,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 18 [2024-09-11 19:27:40,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516003970] [2024-09-11 19:27:40,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:27:40,176 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-11 19:27:40,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:27:40,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-11 19:27:40,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2024-09-11 19:27:40,176 INFO L87 Difference]: Start difference. First operand 322 states and 477 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:42,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:27:42,606 INFO L93 Difference]: Finished difference Result 849 states and 1251 transitions. [2024-09-11 19:27:42,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2024-09-11 19:27:42,607 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2024-09-11 19:27:42,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:27:42,609 INFO L225 Difference]: With dead ends: 849 [2024-09-11 19:27:42,609 INFO L226 Difference]: Without dead ends: 771 [2024-09-11 19:27:42,611 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 36 SyntacticMatches, 8 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3706 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=926, Invalid=9994, Unknown=0, NotChecked=0, Total=10920 [2024-09-11 19:27:42,612 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 308 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 1317 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 1574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 1317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-11 19:27:42,612 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 206 Invalid, 1574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 1317 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-11 19:27:42,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2024-09-11 19:27:42,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 374. [2024-09-11 19:27:42,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 373 states have (on average 1.4986595174262736) internal successors, (559), 373 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:42,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 559 transitions. [2024-09-11 19:27:42,798 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 559 transitions. Word has length 23 [2024-09-11 19:27:42,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:27:42,798 INFO L474 AbstractCegarLoop]: Abstraction has 374 states and 559 transitions. [2024-09-11 19:27:42,798 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:42,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:42,798 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 559 transitions. [2024-09-11 19:27:42,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-11 19:27:42,799 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:27:42,799 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:27:42,811 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-11 19:27:43,002 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-11 19:27:43,002 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:27:43,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:43,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1181574022, now seen corresponding path program 5 times [2024-09-11 19:27:43,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:27:43,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140453944] [2024-09-11 19:27:43,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:27:43,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:27:43,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:27:43,100 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-09-11 19:27:43,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:27:43,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140453944] [2024-09-11 19:27:43,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140453944] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:27:43,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819593808] [2024-09-11 19:27:43,100 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-11 19:27:43,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:27:43,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:27:43,102 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:27:43,103 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-11 19:27:43,158 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-09-11 19:27:43,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:27:43,159 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-11 19:27:43,159 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:27:43,197 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-11 19:27:43,197 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:27:43,221 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-11 19:27:43,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819593808] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:27:43,221 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:27:43,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 12 [2024-09-11 19:27:43,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899110875] [2024-09-11 19:27:43,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:27:43,222 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-11 19:27:43,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:27:43,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-11 19:27:43,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-09-11 19:27:43,222 INFO L87 Difference]: Start difference. First operand 374 states and 559 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:43,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:27:43,790 INFO L93 Difference]: Finished difference Result 643 states and 922 transitions. [2024-09-11 19:27:43,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-11 19:27:43,791 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-09-11 19:27:43,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:27:43,793 INFO L225 Difference]: With dead ends: 643 [2024-09-11 19:27:43,793 INFO L226 Difference]: Without dead ends: 619 [2024-09-11 19:27:43,793 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2024-09-11 19:27:43,793 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 140 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:27:43,793 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 129 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:27:43,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2024-09-11 19:27:43,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 376. [2024-09-11 19:27:43,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 1.488) internal successors, (558), 375 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:43,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 558 transitions. [2024-09-11 19:27:43,997 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 558 transitions. Word has length 25 [2024-09-11 19:27:43,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:27:43,997 INFO L474 AbstractCegarLoop]: Abstraction has 376 states and 558 transitions. [2024-09-11 19:27:43,997 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:43,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:43,998 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 558 transitions. [2024-09-11 19:27:43,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-11 19:27:43,998 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:27:43,999 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:27:44,011 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-11 19:27:44,199 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-11 19:27:44,199 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:27:44,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:44,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1244294231, now seen corresponding path program 5 times [2024-09-11 19:27:44,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:27:44,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082409656] [2024-09-11 19:27:44,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:27:44,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:27:44,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:27:44,358 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:27:44,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:27:44,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082409656] [2024-09-11 19:27:44,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082409656] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:27:44,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64835650] [2024-09-11 19:27:44,359 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-11 19:27:44,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:27:44,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:27:44,361 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:27:44,371 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-11 19:27:44,420 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-09-11 19:27:44,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:27:44,421 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-11 19:27:44,422 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:27:44,525 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:27:44,526 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:27:44,766 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-11 19:27:44,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64835650] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:27:44,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:27:44,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18, 13] total 32 [2024-09-11 19:27:44,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827185614] [2024-09-11 19:27:44,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:27:44,767 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-11 19:27:44,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:27:44,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-11 19:27:44,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=776, Unknown=0, NotChecked=0, Total=992 [2024-09-11 19:27:44,767 INFO L87 Difference]: Start difference. First operand 376 states and 558 transitions. Second operand has 32 states, 32 states have (on average 1.75) internal successors, (56), 32 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:47,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:27:47,165 INFO L93 Difference]: Finished difference Result 1034 states and 1561 transitions. [2024-09-11 19:27:47,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2024-09-11 19:27:47,165 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 32 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-09-11 19:27:47,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:27:47,168 INFO L225 Difference]: With dead ends: 1034 [2024-09-11 19:27:47,168 INFO L226 Difference]: Without dead ends: 952 [2024-09-11 19:27:47,170 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2098 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1727, Invalid=5413, Unknown=0, NotChecked=0, Total=7140 [2024-09-11 19:27:47,170 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 308 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 2013 mSolverCounterSat, 311 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 2324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 311 IncrementalHoareTripleChecker+Valid, 2013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-11 19:27:47,170 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 325 Invalid, 2324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [311 Valid, 2013 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-11 19:27:47,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2024-09-11 19:27:47,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 447. [2024-09-11 19:27:47,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 1.493273542600897) internal successors, (666), 446 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:47,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 666 transitions. [2024-09-11 19:27:47,498 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 666 transitions. Word has length 26 [2024-09-11 19:27:47,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:27:47,498 INFO L474 AbstractCegarLoop]: Abstraction has 447 states and 666 transitions. [2024-09-11 19:27:47,498 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 32 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:47,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:47,498 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 666 transitions. [2024-09-11 19:27:47,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-11 19:27:47,499 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:27:47,499 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:27:47,511 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-09-11 19:27:47,703 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-11 19:27:47,703 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:27:47,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:47,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1045361753, now seen corresponding path program 6 times [2024-09-11 19:27:47,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:27:47,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715579977] [2024-09-11 19:27:47,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:27:47,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:27:47,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:27:47,865 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-11 19:27:47,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:27:47,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715579977] [2024-09-11 19:27:47,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715579977] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:27:47,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035696567] [2024-09-11 19:27:47,865 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-11 19:27:47,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:27:47,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:27:47,867 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:27:47,868 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-11 19:27:47,936 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-09-11 19:27:47,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:27:47,937 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-11 19:27:47,938 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:27:48,055 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-11 19:27:48,055 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:27:48,203 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-11 19:27:48,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035696567] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:27:48,204 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:27:48,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8] total 21 [2024-09-11 19:27:48,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383389819] [2024-09-11 19:27:48,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:27:48,204 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-11 19:27:48,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:27:48,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-11 19:27:48,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2024-09-11 19:27:48,205 INFO L87 Difference]: Start difference. First operand 447 states and 666 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:51,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:27:51,233 INFO L93 Difference]: Finished difference Result 1029 states and 1476 transitions. [2024-09-11 19:27:51,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2024-09-11 19:27:51,233 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2024-09-11 19:27:51,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:27:51,236 INFO L225 Difference]: With dead ends: 1029 [2024-09-11 19:27:51,236 INFO L226 Difference]: Without dead ends: 938 [2024-09-11 19:27:51,238 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 47 SyntacticMatches, 10 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2933 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=989, Invalid=8517, Unknown=0, NotChecked=0, Total=9506 [2024-09-11 19:27:51,238 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 435 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 1093 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 1362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 1093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-11 19:27:51,238 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [435 Valid, 381 Invalid, 1362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 1093 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-11 19:27:51,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2024-09-11 19:27:51,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 471. [2024-09-11 19:27:51,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 1.4893617021276595) internal successors, (700), 470 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:51,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 700 transitions. [2024-09-11 19:27:51,539 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 700 transitions. Word has length 28 [2024-09-11 19:27:51,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:27:51,540 INFO L474 AbstractCegarLoop]: Abstraction has 471 states and 700 transitions. [2024-09-11 19:27:51,540 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:27:51,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:51,540 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 700 transitions. [2024-09-11 19:27:51,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-11 19:27:51,541 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:27:51,541 INFO L216 NwaCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:27:51,553 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-09-11 19:27:51,741 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:27:51,742 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:27:51,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:27:51,742 INFO L85 PathProgramCache]: Analyzing trace with hash -794188873, now seen corresponding path program 6 times [2024-09-11 19:27:51,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:27:51,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513511404] [2024-09-11 19:27:51,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:27:51,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:27:51,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:27:51,922 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-11 19:27:51,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:27:51,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513511404] [2024-09-11 19:27:51,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513511404] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:27:51,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483156509] [2024-09-11 19:27:51,923 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-11 19:27:51,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:27:51,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:27:51,925 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:27:51,928 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-11 19:27:51,985 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-11 19:27:51,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:27:51,986 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-11 19:27:51,987 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:27:52,011 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-11 19:27:52,012 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:27:52,267 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-11 19:27:52,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483156509] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:27:52,267 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:27:52,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 32 [2024-09-11 19:27:52,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309073790] [2024-09-11 19:27:52,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:27:52,268 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-11 19:27:52,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:27:52,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-11 19:27:52,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=818, Unknown=0, NotChecked=0, Total=1056 [2024-09-11 19:27:52,269 INFO L87 Difference]: Start difference. First operand 471 states and 700 transitions. Second operand has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 32 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:28:02,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:28:02,326 INFO L93 Difference]: Finished difference Result 1321 states and 2117 transitions. [2024-09-11 19:28:02,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2024-09-11 19:28:02,327 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 32 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2024-09-11 19:28:02,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:28:02,330 INFO L225 Difference]: With dead ends: 1321 [2024-09-11 19:28:02,330 INFO L226 Difference]: Without dead ends: 1184 [2024-09-11 19:28:02,333 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7998 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=5551, Invalid=15329, Unknown=0, NotChecked=0, Total=20880 [2024-09-11 19:28:02,333 INFO L434 NwaCegarLoop]: 65 mSDtfsCounter, 1615 mSDsluCounter, 897 mSDsCounter, 0 mSdLazyCounter, 1541 mSolverCounterSat, 1065 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1615 SdHoareTripleChecker+Valid, 962 SdHoareTripleChecker+Invalid, 2606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1065 IncrementalHoareTripleChecker+Valid, 1541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-09-11 19:28:02,333 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1615 Valid, 962 Invalid, 2606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1065 Valid, 1541 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-09-11 19:28:02,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1184 states. [2024-09-11 19:28:02,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1184 to 545. [2024-09-11 19:28:02,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 544 states have (on average 1.4926470588235294) internal successors, (812), 544 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:28:02,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 812 transitions. [2024-09-11 19:28:02,722 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 812 transitions. Word has length 28 [2024-09-11 19:28:02,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:28:02,722 INFO L474 AbstractCegarLoop]: Abstraction has 545 states and 812 transitions. [2024-09-11 19:28:02,722 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 32 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:28:02,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:02,723 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 812 transitions. [2024-09-11 19:28:02,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-11 19:28:02,723 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:28:02,723 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:28:02,735 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-09-11 19:28:02,924 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:28:02,924 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:28:02,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:02,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1866772422, now seen corresponding path program 7 times [2024-09-11 19:28:02,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:28:02,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451238089] [2024-09-11 19:28:02,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:28:02,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:28:02,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:28:03,342 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-11 19:28:03,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:28:03,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451238089] [2024-09-11 19:28:03,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451238089] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:28:03,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209250878] [2024-09-11 19:28:03,342 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-11 19:28:03,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:28:03,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:28:03,343 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:28:03,344 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-11 19:28:03,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:28:03,414 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-09-11 19:28:03,415 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:28:03,729 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:28:03,729 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:28:04,348 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:28:04,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209250878] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:28:04,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:28:04,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19, 19] total 46 [2024-09-11 19:28:04,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595098932] [2024-09-11 19:28:04,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:28:04,349 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-09-11 19:28:04,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:28:04,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-09-11 19:28:04,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1965, Unknown=0, NotChecked=0, Total=2162 [2024-09-11 19:28:04,350 INFO L87 Difference]: Start difference. First operand 545 states and 812 transitions. Second operand has 47 states, 47 states have (on average 1.7234042553191489) internal successors, (81), 46 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:28:07,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:28:07,683 INFO L93 Difference]: Finished difference Result 868 states and 1219 transitions. [2024-09-11 19:28:07,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-09-11 19:28:07,683 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.7234042553191489) internal successors, (81), 46 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2024-09-11 19:28:07,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:28:07,686 INFO L225 Difference]: With dead ends: 868 [2024-09-11 19:28:07,686 INFO L226 Difference]: Without dead ends: 745 [2024-09-11 19:28:07,687 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1402 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=891, Invalid=6081, Unknown=0, NotChecked=0, Total=6972 [2024-09-11 19:28:07,687 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 261 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 1248 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 1462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 1248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-11 19:28:07,687 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 221 Invalid, 1462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 1248 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-11 19:28:07,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2024-09-11 19:28:08,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 568. [2024-09-11 19:28:08,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 567 states have (on average 1.4779541446208113) internal successors, (838), 567 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:28:08,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 838 transitions. [2024-09-11 19:28:08,158 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 838 transitions. Word has length 29 [2024-09-11 19:28:08,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:28:08,158 INFO L474 AbstractCegarLoop]: Abstraction has 568 states and 838 transitions. [2024-09-11 19:28:08,159 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.7234042553191489) internal successors, (81), 46 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:28:08,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:08,159 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 838 transitions. [2024-09-11 19:28:08,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-11 19:28:08,159 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:28:08,159 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:28:08,171 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-09-11 19:28:08,360 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:28:08,360 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:28:08,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:08,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1031660891, now seen corresponding path program 7 times [2024-09-11 19:28:08,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:28:08,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002133291] [2024-09-11 19:28:08,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:28:08,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:28:08,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:28:08,539 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:28:08,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:28:08,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002133291] [2024-09-11 19:28:08,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002133291] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:28:08,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636487757] [2024-09-11 19:28:08,540 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-11 19:28:08,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:28:08,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:28:08,541 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:28:08,542 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-11 19:28:08,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:28:08,581 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-11 19:28:08,583 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:28:08,706 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-11 19:28:08,707 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:28:08,883 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-11 19:28:08,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636487757] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:28:08,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:28:08,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 31 [2024-09-11 19:28:08,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261292978] [2024-09-11 19:28:08,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:28:08,884 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-09-11 19:28:08,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:28:08,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-09-11 19:28:08,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2024-09-11 19:28:08,885 INFO L87 Difference]: Start difference. First operand 568 states and 838 transitions. Second operand has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:28:13,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:28:13,067 INFO L93 Difference]: Finished difference Result 2004 states and 3086 transitions. [2024-09-11 19:28:13,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2024-09-11 19:28:13,068 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2024-09-11 19:28:13,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:28:13,073 INFO L225 Difference]: With dead ends: 2004 [2024-09-11 19:28:13,073 INFO L226 Difference]: Without dead ends: 1921 [2024-09-11 19:28:13,074 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2284 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1644, Invalid=7668, Unknown=0, NotChecked=0, Total=9312 [2024-09-11 19:28:13,074 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 426 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 2913 mSolverCounterSat, 360 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 3273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 360 IncrementalHoareTripleChecker+Valid, 2913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-11 19:28:13,074 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [426 Valid, 633 Invalid, 3273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [360 Valid, 2913 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-11 19:28:13,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1921 states. [2024-09-11 19:28:13,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1921 to 776. [2024-09-11 19:28:13,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 775 states have (on average 1.5083870967741935) internal successors, (1169), 775 states have internal predecessors, (1169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:28:13,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1169 transitions. [2024-09-11 19:28:13,803 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1169 transitions. Word has length 29 [2024-09-11 19:28:13,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:28:13,803 INFO L474 AbstractCegarLoop]: Abstraction has 776 states and 1169 transitions. [2024-09-11 19:28:13,803 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:28:13,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:13,803 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1169 transitions. [2024-09-11 19:28:13,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-11 19:28:13,804 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:28:13,804 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:28:13,820 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-09-11 19:28:14,005 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-09-11 19:28:14,005 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:28:14,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:14,005 INFO L85 PathProgramCache]: Analyzing trace with hash 657800027, now seen corresponding path program 8 times [2024-09-11 19:28:14,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:28:14,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109366034] [2024-09-11 19:28:14,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:28:14,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:28:14,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:28:14,149 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-09-11 19:28:14,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:28:14,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109366034] [2024-09-11 19:28:14,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109366034] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:28:14,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148988707] [2024-09-11 19:28:14,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 19:28:14,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:28:14,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:28:14,152 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:28:14,153 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-11 19:28:14,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 19:28:14,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:28:14,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-11 19:28:14,195 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:28:14,260 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-11 19:28:14,260 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:28:14,294 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-11 19:28:14,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148988707] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:28:14,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:28:14,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 15 [2024-09-11 19:28:14,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217531738] [2024-09-11 19:28:14,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:28:14,295 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-11 19:28:14,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:28:14,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-11 19:28:14,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2024-09-11 19:28:14,296 INFO L87 Difference]: Start difference. First operand 776 states and 1169 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:28:18,533 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-11 19:28:27,449 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-11 19:28:31,455 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-11 19:28:32,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:28:32,337 INFO L93 Difference]: Finished difference Result 1416 states and 2033 transitions. [2024-09-11 19:28:32,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-11 19:28:32,338 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2024-09-11 19:28:32,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:28:32,343 INFO L225 Difference]: With dead ends: 1416 [2024-09-11 19:28:32,343 INFO L226 Difference]: Without dead ends: 1355 [2024-09-11 19:28:32,343 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=144, Invalid=407, Unknown=1, NotChecked=0, Total=552 [2024-09-11 19:28:32,344 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 112 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 49 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.2s IncrementalHoareTripleChecker+Time [2024-09-11 19:28:32,344 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 292 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 191 Invalid, 3 Unknown, 0 Unchecked, 12.2s Time] [2024-09-11 19:28:32,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2024-09-11 19:28:33,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 820. [2024-09-11 19:28:33,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 819 states have (on average 1.5054945054945055) internal successors, (1233), 819 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:28:33,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 1233 transitions. [2024-09-11 19:28:33,146 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 1233 transitions. Word has length 31 [2024-09-11 19:28:33,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:28:33,146 INFO L474 AbstractCegarLoop]: Abstraction has 820 states and 1233 transitions. [2024-09-11 19:28:33,146 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:28:33,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:33,147 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 1233 transitions. [2024-09-11 19:28:33,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-11 19:28:33,148 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:28:33,148 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:28:33,160 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-09-11 19:28:33,348 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-09-11 19:28:33,348 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:28:33,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:33,349 INFO L85 PathProgramCache]: Analyzing trace with hash 889240280, now seen corresponding path program 9 times [2024-09-11 19:28:33,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:28:33,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747896261] [2024-09-11 19:28:33,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:28:33,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:28:33,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:28:33,470 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-09-11 19:28:33,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:28:33,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747896261] [2024-09-11 19:28:33,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747896261] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:28:33,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251267180] [2024-09-11 19:28:33,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-11 19:28:33,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:28:33,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:28:33,472 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:28:33,473 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-11 19:28:33,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-11 19:28:33,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:28:33,574 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-11 19:28:33,574 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:28:33,664 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-11 19:28:33,664 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:28:33,766 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-11 19:28:33,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251267180] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:28:33,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:28:33,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 22 [2024-09-11 19:28:33,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686691883] [2024-09-11 19:28:33,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:28:33,767 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-11 19:28:33,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:28:33,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-11 19:28:33,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2024-09-11 19:28:33,767 INFO L87 Difference]: Start difference. First operand 820 states and 1233 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:28:35,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:28:35,968 INFO L93 Difference]: Finished difference Result 1192 states and 1763 transitions. [2024-09-11 19:28:35,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-09-11 19:28:35,968 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2024-09-11 19:28:35,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:28:35,971 INFO L225 Difference]: With dead ends: 1192 [2024-09-11 19:28:35,971 INFO L226 Difference]: Without dead ends: 863 [2024-09-11 19:28:35,972 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1100 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=438, Invalid=4254, Unknown=0, NotChecked=0, Total=4692 [2024-09-11 19:28:35,972 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 89 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 1231 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 1353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-11 19:28:35,972 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 476 Invalid, 1353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1231 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-11 19:28:35,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2024-09-11 19:28:36,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 733. [2024-09-11 19:28:36,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 732 states have (on average 1.4877049180327868) internal successors, (1089), 732 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:28:36,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 1089 transitions. [2024-09-11 19:28:36,700 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 1089 transitions. Word has length 32 [2024-09-11 19:28:36,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:28:36,701 INFO L474 AbstractCegarLoop]: Abstraction has 733 states and 1089 transitions. [2024-09-11 19:28:36,701 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:28:36,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:36,701 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 1089 transitions. [2024-09-11 19:28:36,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-11 19:28:36,702 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:28:36,702 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:28:36,717 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-09-11 19:28:36,902 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:28:36,903 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:28:36,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:36,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1384429928, now seen corresponding path program 2 times [2024-09-11 19:28:36,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:28:36,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965899079] [2024-09-11 19:28:36,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:28:36,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:28:36,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:28:37,072 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-09-11 19:28:37,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:28:37,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965899079] [2024-09-11 19:28:37,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965899079] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:28:37,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576963639] [2024-09-11 19:28:37,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 19:28:37,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:28:37,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:28:37,074 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:28:37,075 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-11 19:28:37,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 19:28:37,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:28:37,118 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-09-11 19:28:37,119 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:28:37,240 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-09-11 19:28:37,240 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:28:37,541 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-09-11 19:28:37,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576963639] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:28:37,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:28:37,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 38 [2024-09-11 19:28:37,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707642172] [2024-09-11 19:28:37,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:28:37,542 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-11 19:28:37,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:28:37,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-11 19:28:37,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1205, Unknown=0, NotChecked=0, Total=1406 [2024-09-11 19:28:37,543 INFO L87 Difference]: Start difference. First operand 733 states and 1089 transitions. Second operand has 38 states, 38 states have (on average 1.368421052631579) internal successors, (52), 38 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:28:43,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:28:43,042 INFO L93 Difference]: Finished difference Result 1212 states and 1748 transitions. [2024-09-11 19:28:43,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2024-09-11 19:28:43,042 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.368421052631579) internal successors, (52), 38 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2024-09-11 19:28:43,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:28:43,045 INFO L225 Difference]: With dead ends: 1212 [2024-09-11 19:28:43,045 INFO L226 Difference]: Without dead ends: 939 [2024-09-11 19:28:43,049 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6345 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1581, Invalid=18159, Unknown=0, NotChecked=0, Total=19740 [2024-09-11 19:28:43,049 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 219 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 1841 mSolverCounterSat, 421 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 2262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 421 IncrementalHoareTripleChecker+Valid, 1841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:28:43,050 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 553 Invalid, 2262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [421 Valid, 1841 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-11 19:28:43,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2024-09-11 19:28:43,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 709. [2024-09-11 19:28:43,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 709 states, 708 states have (on average 1.4703389830508475) internal successors, (1041), 708 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:28:43,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 709 states to 709 states and 1041 transitions. [2024-09-11 19:28:43,807 INFO L78 Accepts]: Start accepts. Automaton has 709 states and 1041 transitions. Word has length 32 [2024-09-11 19:28:43,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:28:43,807 INFO L474 AbstractCegarLoop]: Abstraction has 709 states and 1041 transitions. [2024-09-11 19:28:43,807 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.368421052631579) internal successors, (52), 38 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:28:43,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:43,807 INFO L276 IsEmpty]: Start isEmpty. Operand 709 states and 1041 transitions. [2024-09-11 19:28:43,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-11 19:28:43,808 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:28:43,808 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:28:43,820 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-09-11 19:28:44,008 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-09-11 19:28:44,009 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:28:44,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:28:44,009 INFO L85 PathProgramCache]: Analyzing trace with hash 869260156, now seen corresponding path program 3 times [2024-09-11 19:28:44,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:28:44,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630891157] [2024-09-11 19:28:44,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:28:44,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:28:44,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:28:44,230 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:28:44,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:28:44,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630891157] [2024-09-11 19:28:44,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630891157] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:28:44,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30029077] [2024-09-11 19:28:44,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-11 19:28:44,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:28:44,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:28:44,232 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:28:44,234 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-11 19:28:44,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-11 19:28:44,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:28:44,304 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-09-11 19:28:44,306 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:28:44,505 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-09-11 19:28:44,505 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:28:44,752 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-09-11 19:28:44,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30029077] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:28:44,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:28:44,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10, 10] total 27 [2024-09-11 19:28:44,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017216170] [2024-09-11 19:28:44,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:28:44,753 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-11 19:28:44,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:28:44,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-11 19:28:44,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2024-09-11 19:28:44,754 INFO L87 Difference]: Start difference. First operand 709 states and 1041 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:29:01,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:29:01,659 INFO L93 Difference]: Finished difference Result 2232 states and 3045 transitions. [2024-09-11 19:29:01,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 321 states. [2024-09-11 19:29:01,659 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2024-09-11 19:29:01,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:29:01,664 INFO L225 Difference]: With dead ends: 2232 [2024-09-11 19:29:01,664 INFO L226 Difference]: Without dead ends: 2130 [2024-09-11 19:29:01,668 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 51 SyntacticMatches, 14 SemanticMatches, 341 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49785 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=5332, Invalid=111974, Unknown=0, NotChecked=0, Total=117306 [2024-09-11 19:29:01,668 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 989 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 4716 mSolverCounterSat, 953 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 989 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 5669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 953 IncrementalHoareTripleChecker+Valid, 4716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-09-11 19:29:01,668 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [989 Valid, 351 Invalid, 5669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [953 Valid, 4716 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2024-09-11 19:29:01,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2130 states. [2024-09-11 19:29:02,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2130 to 801. [2024-09-11 19:29:02,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 800 states have (on average 1.47375) internal successors, (1179), 800 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:29:02,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 1179 transitions. [2024-09-11 19:29:02,605 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 1179 transitions. Word has length 33 [2024-09-11 19:29:02,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:29:02,606 INFO L474 AbstractCegarLoop]: Abstraction has 801 states and 1179 transitions. [2024-09-11 19:29:02,606 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:29:02,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:29:02,606 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 1179 transitions. [2024-09-11 19:29:02,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-11 19:29:02,607 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:29:02,607 INFO L216 NwaCegarLoop]: trace histogram [13, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:29:02,619 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-09-11 19:29:02,808 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-09-11 19:29:02,808 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:29:02,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:29:02,809 INFO L85 PathProgramCache]: Analyzing trace with hash -591274920, now seen corresponding path program 10 times [2024-09-11 19:29:02,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:29:02,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850674260] [2024-09-11 19:29:02,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:29:02,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:29:02,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:29:03,012 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-11 19:29:03,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:29:03,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850674260] [2024-09-11 19:29:03,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850674260] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:29:03,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534323563] [2024-09-11 19:29:03,013 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-11 19:29:03,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:29:03,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:29:03,014 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:29:03,015 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-09-11 19:29:03,057 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-11 19:29:03,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:29:03,058 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-11 19:29:03,058 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:29:03,086 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-11 19:29:03,086 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:29:03,436 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-11 19:29:03,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534323563] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:29:03,436 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:29:03,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 36 [2024-09-11 19:29:03,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959868664] [2024-09-11 19:29:03,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:29:03,437 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-11 19:29:03,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:29:03,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-11 19:29:03,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=1053, Unknown=0, NotChecked=0, Total=1332 [2024-09-11 19:29:03,438 INFO L87 Difference]: Start difference. First operand 801 states and 1179 transitions. Second operand has 37 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 36 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:29:27,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:29:27,543 INFO L93 Difference]: Finished difference Result 2254 states and 3313 transitions. [2024-09-11 19:29:27,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 217 states. [2024-09-11 19:29:27,544 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 36 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2024-09-11 19:29:27,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:29:27,549 INFO L225 Difference]: With dead ends: 2254 [2024-09-11 19:29:27,549 INFO L226 Difference]: Without dead ends: 1832 [2024-09-11 19:29:27,551 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22533 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=12227, Invalid=42763, Unknown=0, NotChecked=0, Total=54990 [2024-09-11 19:29:27,551 INFO L434 NwaCegarLoop]: 70 mSDtfsCounter, 2169 mSDsluCounter, 1067 mSDsCounter, 0 mSdLazyCounter, 2012 mSolverCounterSat, 1578 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2169 SdHoareTripleChecker+Valid, 1137 SdHoareTripleChecker+Invalid, 3590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1578 IncrementalHoareTripleChecker+Valid, 2012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2024-09-11 19:29:27,552 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2169 Valid, 1137 Invalid, 3590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1578 Valid, 2012 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2024-09-11 19:29:27,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1832 states. [2024-09-11 19:29:28,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1832 to 875. [2024-09-11 19:29:28,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 1.4736842105263157) internal successors, (1288), 874 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:29:28,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 1288 transitions. [2024-09-11 19:29:28,614 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 1288 transitions. Word has length 34 [2024-09-11 19:29:28,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:29:28,614 INFO L474 AbstractCegarLoop]: Abstraction has 875 states and 1288 transitions. [2024-09-11 19:29:28,614 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 36 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:29:28,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:29:28,614 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 1288 transitions. [2024-09-11 19:29:28,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-11 19:29:28,615 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:29:28,615 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:29:28,627 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-09-11 19:29:28,816 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-09-11 19:29:28,816 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:29:28,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:29:28,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1251258075, now seen corresponding path program 11 times [2024-09-11 19:29:28,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:29:28,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798458074] [2024-09-11 19:29:28,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:29:28,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:29:28,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:29:29,384 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-11 19:29:29,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:29:29,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798458074] [2024-09-11 19:29:29,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798458074] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:29:29,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425995772] [2024-09-11 19:29:29,384 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-11 19:29:29,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:29:29,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:29:29,385 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:29:29,386 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-09-11 19:29:29,485 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-09-11 19:29:29,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:29:29,487 WARN L260 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 103 conjuncts are in the unsatisfiable core [2024-09-11 19:29:29,488 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:29:30,640 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:29:30,640 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:29:32,305 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:29:32,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425995772] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:29:32,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:29:32,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 29, 25] total 63 [2024-09-11 19:29:32,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548944340] [2024-09-11 19:29:32,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:29:32,306 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2024-09-11 19:29:32,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:29:32,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2024-09-11 19:29:32,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=3617, Unknown=0, NotChecked=0, Total=4032 [2024-09-11 19:29:32,307 INFO L87 Difference]: Start difference. First operand 875 states and 1288 transitions. Second operand has 64 states, 64 states have (on average 1.515625) internal successors, (97), 63 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:29:46,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:29:46,498 INFO L93 Difference]: Finished difference Result 1597 states and 2119 transitions. [2024-09-11 19:29:46,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2024-09-11 19:29:46,499 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.515625) internal successors, (97), 63 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2024-09-11 19:29:46,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:29:46,502 INFO L225 Difference]: With dead ends: 1597 [2024-09-11 19:29:46,502 INFO L226 Difference]: Without dead ends: 1443 [2024-09-11 19:29:46,503 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3329 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=1557, Invalid=11325, Unknown=0, NotChecked=0, Total=12882 [2024-09-11 19:29:46,503 INFO L434 NwaCegarLoop]: 4 mSDtfsCounter, 194 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 1534 mSolverCounterSat, 320 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 1854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 320 IncrementalHoareTripleChecker+Valid, 1534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-09-11 19:29:46,504 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 171 Invalid, 1854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [320 Valid, 1534 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-09-11 19:29:46,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1443 states. [2024-09-11 19:29:47,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1443 to 859. [2024-09-11 19:29:47,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 858 states have (on average 1.472027972027972) internal successors, (1263), 858 states have internal predecessors, (1263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:29:47,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 1263 transitions. [2024-09-11 19:29:47,616 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 1263 transitions. Word has length 35 [2024-09-11 19:29:47,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:29:47,617 INFO L474 AbstractCegarLoop]: Abstraction has 859 states and 1263 transitions. [2024-09-11 19:29:47,617 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.515625) internal successors, (97), 63 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:29:47,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:29:47,617 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 1263 transitions. [2024-09-11 19:29:47,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-11 19:29:47,618 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:29:47,618 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:29:47,631 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-09-11 19:29:47,818 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-09-11 19:29:47,818 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:29:47,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:29:47,819 INFO L85 PathProgramCache]: Analyzing trace with hash 882353674, now seen corresponding path program 4 times [2024-09-11 19:29:47,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:29:47,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327631835] [2024-09-11 19:29:47,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:29:47,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:29:47,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:29:48,054 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:29:48,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:29:48,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327631835] [2024-09-11 19:29:48,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327631835] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:29:48,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089585133] [2024-09-11 19:29:48,055 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-11 19:29:48,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:29:48,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:29:48,056 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:29:48,056 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-09-11 19:29:48,096 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-11 19:29:48,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:29:48,097 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-11 19:29:48,097 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:29:48,254 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-09-11 19:29:48,254 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:29:48,481 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-09-11 19:29:48,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089585133] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:29:48,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:29:48,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11, 11] total 39 [2024-09-11 19:29:48,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257631372] [2024-09-11 19:29:48,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:29:48,482 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-09-11 19:29:48,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:29:48,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-09-11 19:29:48,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1236, Unknown=0, NotChecked=0, Total=1482 [2024-09-11 19:29:48,482 INFO L87 Difference]: Start difference. First operand 859 states and 1263 transitions. Second operand has 39 states, 39 states have (on average 1.7179487179487178) internal successors, (67), 39 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:29:57,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:29:57,625 INFO L93 Difference]: Finished difference Result 2471 states and 3731 transitions. [2024-09-11 19:29:57,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2024-09-11 19:29:57,626 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.7179487179487178) internal successors, (67), 39 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2024-09-11 19:29:57,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:29:57,632 INFO L225 Difference]: With dead ends: 2471 [2024-09-11 19:29:57,632 INFO L226 Difference]: Without dead ends: 2336 [2024-09-11 19:29:57,633 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6704 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3797, Invalid=17959, Unknown=0, NotChecked=0, Total=21756 [2024-09-11 19:29:57,633 INFO L434 NwaCegarLoop]: 53 mSDtfsCounter, 651 mSDsluCounter, 1112 mSDsCounter, 0 mSdLazyCounter, 5828 mSolverCounterSat, 571 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 651 SdHoareTripleChecker+Valid, 1165 SdHoareTripleChecker+Invalid, 6399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 571 IncrementalHoareTripleChecker+Valid, 5828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:29:57,633 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [651 Valid, 1165 Invalid, 6399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [571 Valid, 5828 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-09-11 19:29:57,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2336 states. [2024-09-11 19:29:59,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2336 to 1014. [2024-09-11 19:29:59,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1014 states, 1013 states have (on average 1.4787759131293188) internal successors, (1498), 1013 states have internal predecessors, (1498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:29:59,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1014 states to 1014 states and 1498 transitions. [2024-09-11 19:29:59,072 INFO L78 Accepts]: Start accepts. Automaton has 1014 states and 1498 transitions. Word has length 36 [2024-09-11 19:29:59,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:29:59,072 INFO L474 AbstractCegarLoop]: Abstraction has 1014 states and 1498 transitions. [2024-09-11 19:29:59,072 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.7179487179487178) internal successors, (67), 39 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:29:59,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:29:59,073 INFO L276 IsEmpty]: Start isEmpty. Operand 1014 states and 1498 transitions. [2024-09-11 19:29:59,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-11 19:29:59,074 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:29:59,074 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:29:59,086 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-09-11 19:29:59,274 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,27 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:29:59,274 INFO L399 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:29:59,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:29:59,274 INFO L85 PathProgramCache]: Analyzing trace with hash -655498534, now seen corresponding path program 12 times [2024-09-11 19:29:59,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:29:59,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152351562] [2024-09-11 19:29:59,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:29:59,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:29:59,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:29:59,404 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-09-11 19:29:59,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:29:59,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152351562] [2024-09-11 19:29:59,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152351562] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:29:59,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339274682] [2024-09-11 19:29:59,405 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-11 19:29:59,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:29:59,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:29:59,407 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:29:59,408 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-09-11 19:29:59,458 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-09-11 19:29:59,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:29:59,459 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-11 19:29:59,460 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:29:59,565 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-11 19:29:59,565 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:29:59,681 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-11 19:29:59,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339274682] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:29:59,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:29:59,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2024-09-11 19:29:59,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718381848] [2024-09-11 19:29:59,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:29:59,682 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-11 19:29:59,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:29:59,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-11 19:29:59,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2024-09-11 19:29:59,683 INFO L87 Difference]: Start difference. First operand 1014 states and 1498 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:30:04,070 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-11 19:30:08,149 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-11 19:30:10,300 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-11 19:30:14,487 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-11 19:30:18,608 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-11 19:30:22,785 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-11 19:30:27,140 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-11 19:30:31,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:30:31,664 INFO L93 Difference]: Finished difference Result 2850 states and 4101 transitions. [2024-09-11 19:30:31,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-11 19:30:31,664 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2024-09-11 19:30:31,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:30:31,671 INFO L225 Difference]: With dead ends: 2850 [2024-09-11 19:30:31,671 INFO L226 Difference]: Without dead ends: 2449 [2024-09-11 19:30:31,671 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 62 SyntacticMatches, 11 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2024-09-11 19:30:31,672 INFO L434 NwaCegarLoop]: 55 mSDtfsCounter, 291 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 90 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.2s IncrementalHoareTripleChecker+Time [2024-09-11 19:30:31,672 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 360 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 161 Invalid, 6 Unknown, 0 Unchecked, 26.2s Time] [2024-09-11 19:30:31,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2449 states. [2024-09-11 19:30:33,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2449 to 1371. [2024-09-11 19:30:33,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1371 states, 1370 states have (on average 1.472992700729927) internal successors, (2018), 1370 states have internal predecessors, (2018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:30:33,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1371 states to 1371 states and 2018 transitions. [2024-09-11 19:30:33,442 INFO L78 Accepts]: Start accepts. Automaton has 1371 states and 2018 transitions. Word has length 37 [2024-09-11 19:30:33,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:30:33,442 INFO L474 AbstractCegarLoop]: Abstraction has 1371 states and 2018 transitions. [2024-09-11 19:30:33,442 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:30:33,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:30:33,442 INFO L276 IsEmpty]: Start isEmpty. Operand 1371 states and 2018 transitions. [2024-09-11 19:30:33,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-11 19:30:33,443 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:30:33,443 INFO L216 NwaCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:30:33,455 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-09-11 19:30:33,644 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-09-11 19:30:33,644 INFO L399 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:30:33,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:30:33,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1342379195, now seen corresponding path program 4 times [2024-09-11 19:30:33,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:30:33,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999400198] [2024-09-11 19:30:33,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:30:33,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:30:33,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:30:34,011 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:30:34,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:30:34,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999400198] [2024-09-11 19:30:34,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999400198] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:30:34,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439167809] [2024-09-11 19:30:34,012 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-11 19:30:34,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:30:34,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:30:34,013 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:30:34,013 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-09-11 19:30:34,052 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-11 19:30:34,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:30:34,053 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-09-11 19:30:34,054 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:30:34,093 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:30:34,093 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:30:34,982 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:30:34,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439167809] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:30:34,982 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:30:34,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 58 [2024-09-11 19:30:34,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319479767] [2024-09-11 19:30:34,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:30:34,983 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-09-11 19:30:34,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:30:34,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-09-11 19:30:34,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=846, Invalid=2576, Unknown=0, NotChecked=0, Total=3422 [2024-09-11 19:30:34,984 INFO L87 Difference]: Start difference. First operand 1371 states and 2018 transitions. Second operand has 59 states, 59 states have (on average 1.1694915254237288) internal successors, (69), 58 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:31:41,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:31:41,530 INFO L93 Difference]: Finished difference Result 8640 states and 14776 transitions. [2024-09-11 19:31:41,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2024-09-11 19:31:41,531 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.1694915254237288) internal successors, (69), 58 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2024-09-11 19:31:41,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:31:41,547 INFO L225 Difference]: With dead ends: 8640 [2024-09-11 19:31:41,547 INFO L226 Difference]: Without dead ends: 7954 [2024-09-11 19:31:41,549 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6972 ImplicationChecksByTransitivity, 36.2s TimeCoverageRelationStatistics Valid=7972, Invalid=17468, Unknown=0, NotChecked=0, Total=25440 [2024-09-11 19:31:41,549 INFO L434 NwaCegarLoop]: 128 mSDtfsCounter, 5553 mSDsluCounter, 3527 mSDsCounter, 0 mSdLazyCounter, 4678 mSolverCounterSat, 2906 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5553 SdHoareTripleChecker+Valid, 3655 SdHoareTripleChecker+Invalid, 7584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2906 IncrementalHoareTripleChecker+Valid, 4678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.4s IncrementalHoareTripleChecker+Time [2024-09-11 19:31:41,550 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5553 Valid, 3655 Invalid, 7584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2906 Valid, 4678 Invalid, 0 Unknown, 0 Unchecked, 21.4s Time] [2024-09-11 19:31:41,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7954 states. [2024-09-11 19:31:45,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7954 to 2573. [2024-09-11 19:31:45,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2573 states, 2572 states have (on average 1.4510108864696734) internal successors, (3732), 2572 states have internal predecessors, (3732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:31:45,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2573 states to 2573 states and 3732 transitions. [2024-09-11 19:31:45,691 INFO L78 Accepts]: Start accepts. Automaton has 2573 states and 3732 transitions. Word has length 37 [2024-09-11 19:31:45,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:31:45,691 INFO L474 AbstractCegarLoop]: Abstraction has 2573 states and 3732 transitions. [2024-09-11 19:31:45,691 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.1694915254237288) internal successors, (69), 58 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:31:45,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:31:45,691 INFO L276 IsEmpty]: Start isEmpty. Operand 2573 states and 3732 transitions. [2024-09-11 19:31:45,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-11 19:31:45,693 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:31:45,693 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:31:45,704 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-09-11 19:31:45,893 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:31:45,893 INFO L399 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:31:45,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:31:45,893 INFO L85 PathProgramCache]: Analyzing trace with hash -996766359, now seen corresponding path program 13 times [2024-09-11 19:31:45,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:31:45,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868451553] [2024-09-11 19:31:45,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:31:45,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:31:45,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:31:46,051 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-11 19:31:46,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:31:46,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868451553] [2024-09-11 19:31:46,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868451553] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:31:46,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621089787] [2024-09-11 19:31:46,051 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-11 19:31:46,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:31:46,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:31:46,052 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:31:46,053 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-09-11 19:31:46,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:31:46,097 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-11 19:31:46,098 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:31:46,153 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-11 19:31:46,153 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:31:46,298 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 24 proven. 12 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-09-11 19:31:46,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621089787] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:31:46,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:31:46,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 10] total 28 [2024-09-11 19:31:46,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407388326] [2024-09-11 19:31:46,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:31:46,299 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-11 19:31:46,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:31:46,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-11 19:31:46,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2024-09-11 19:31:46,299 INFO L87 Difference]: Start difference. First operand 2573 states and 3732 transitions. Second operand has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)